Dark matter and Modified Newtonian Dynamics in a sample of high-redshift galaxy clusters observed with Chandra

Details Dark matter and Modified Newtonian Dynamics in a sample of high-redshift galaxy clusters observed with Chandra Dark matter and Modified Newtonian Dynamics in a sample of high-redshift galaxy clusters observed with Chandra

2009-07-14

arxiv.org/abs/0907.2279v1

New Astron.15:159-169,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

New Astronomy in press

Scientific paper

10.1016/j.newast.2009.07.004

We compare the measurement of the gravitational mass of 38 high-redshift galaxy clusters observed by Chandra using Modified Newtonian Dynamics (MOND) and standard Newtonian gravity. Our analysis confirms earlier findings that MOND cannot explain the difference between the baryonic mass and the total mass inferred from the assumption of hydrostatic equilibrium. We also find that the baryon fraction at $r_{2500}$ using MOND is consistent with the Wilkinson Microwave Anisotropy Probe (WMAP) value of $\Omega_{B}/\Omega_{M}$

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